ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Recent Posts
Green House wiring
by gfretwell. 07/20/17 12:39 AM
1913 American Electrician's Handbook
by Admin. 07/19/17 08:41 PM
Permit Snafus...AHJs and Contractors Jump in
by HotLine1. 07/18/17 08:06 PM
210.70 / Wall Switch / When adopted?
by HotLine1. 07/16/17 11:25 AM
New in the Gallery:
SE cable question
Popular Topics(Views)
239,163 Are you busy
174,542 Re: Forum
166,984 Need opinion
Who's Online Now
1 registered members (Potseal), 44 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#35279 - 03/07/04 02:09 AM Lightning Protection  
RJD  Offline
Junior Member
Joined: Mar 2004
Posts: 1
canada
Hello, at work we have a steel structure. There are two poes on either side of the structure with an array of conductors above the structure. The array is attached to a four electrode grid. The stucture is bonded to this grid.I have been tasked to do periodic maintenance on this protection. Any of you out there do ths before? Any suggestions on what to do and of any special equipment I may need to procure.Thanks in advance!


Work Gear for Electricians and the Trades

#35280 - 03/07/04 04:41 PM Re: Lightning Protection  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
There may be a Canadian equivalent to NFPA standard 780-2000 that is used below the 49th parallel. It is not ‘breezy’ reading, but carries a lot of weight. Using such a document as the basis for review of an existing installation “do’s and don’ts” may be worthwhile.

Periodic ground-resistance “fall of potential’ {3-lead} testing is also fairly common in lightning-protection maintenace. With the lightning-protection ground rods forming a grid of larger area, {than, say, a single rod} recommended spacing for test electrodes may be quite large
http://www.aemc.com/techinfo/techworkbooks/ground_resistance_testers/950-WKBK-GROUND.pdf [40 pages ~360KB] http://205.247.219.223/training/catalog/common_viewproduct.asp?product=122 [description only]

The effort and expense generally expended for maintenance of a lightning-protection system has a lot to do with the value of the protected facility. A 17th-century museum or television studio usually gets a lot more attention than a convenience store or hay barn.



Member Spotlight
RH1
RH1
California
Posts: 22
Joined: August 2009
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.009s Queries: 14 (0.002s) Memory: 0.7442 MB (Peak: 0.8608 MB) Zlib enabled. Server Time: 2017-07-20 12:28:41 UTC